You can't seriously compare Japanese imperialism to Russian imperialism. Japanese imperialism led to the deaths of more than 15 million Chinese people in just eight years. In comparison, the effects of Russian imperialism on China are negligible. Russia also played a crucial role in defeating the Imperial Japanese Army in Manchuria.It amazes me to no end how you Chinese can be so forgiving towards Russian imperialism yet so vengeful towards Japanese and British imperialism.
The vast majority of Chinese people aren't "vengeful" towards Japan and Britain. If that was the case, Japanese and British culture wouldn't be so popular in China. I think the best way to describe the attitude of most Chinese people when it comes to Japanese imperialism and British imperialism is "forgive, but don't forget, so that it doesn't happen again." I haven't met a single Chinese person in real life who wants to exact revenge on Japan and Britain.